Specification

Type：Engine Rebuild Kit

Bore Size：STD 47.5mm

Stroke：47.8mm

Replace OEM Numbers：

Cylinder(YZ80)：4ES-11311-20-00, 4ES-11311-30-00

Cylinder(YZ85)：5PA-11311-20-00, 5PA-11311-30-00

Cylinder Base Gasket：4ES-11351-00-00

Piston：4ES-11631-01-A0, 5PA-11631-00-D0

Pin, Piston：4ES-11633-00-00

Piston Ring：43K-11611-00-00

Circlips, Piston：93450-16115-00

O-Ring Seal：93210-56459-00, 93210-84724-00 

Needle Bearing(14 x 18 x 16.5 mm)：93310-21417-00

Fitment

Fit For Yamaha YZ85 2002-2018

Fit For Yamaha YZ80 1993-2001

Package 

1 x 47.5mm Cylinder

1 x Piston(STD)

1 x Piston Ring

1 x Wristpin

1 x Cylinder Base Gasket

1 x Needle bearing

2 x O-Ring Seals

2 x Circlips

(Same As Photos)